-
1 Dauerstrombelastbarkeit, f
(длительный) допустимый ток
Максимальное значение электрического тока, который может протекать длительно по проводнику, устройству или аппарату при определенных условиях без превышения определенного значения их температуры в установившемся режиме
[ ГОСТ Р МЭК 60050-826-2009]
Этот ток обозначают IZ
[ ГОСТ Р 50571. 1-2009 ( МЭК 60364-1: 2005)]EN
(continuous) current-carrying capacity
ampacity (US)
maximum value of electric current which can be carried continuously by a conductor, a device or an apparatus, under specified conditions without its steady-state temperature exceeding a specified value
[IEV number 826-11-13]
ampacity
The current in amperes that a conductor can carry continuously under the conditions of use without exceeding its temperature rating.
[National Electrical Cod]FR
courant (permanent) admissible, m
valeur maximale du courant électrique qui peut parcourir en permanence, un conducteur, un dispositif ou un appareil, sans que sa température de régime permanent, dans des conditions données, soit supérieure à la valeur spécifiée
[IEV number 826-11-13]Ampacity, the term is defined as the maximum amount of current a cable can carry before sustaining immediate or progressive deterioration. Also described as current rating or current-carrying capacity, is the RMS electric current which a device can continuously carry while remaining within its temperature rating. The ampacity of a cable depends on:
- its insulation temperature rating;
- conductor electrical properties for current;
- frequency, in the case of alternating currents;
- ability to dissipate heat, which depends on cable geometry and its surroundings;
- ambient temperature.
Electric wires have some resistance, and electric current flowing through them causes voltage drop and power dissipation, which heats the cable. Copper or aluminum can conduct a large amount of current before melting, but long before the conductors melt, their insulation would be damaged by the heat.
The ampacity for a power cable is thus based on physical and electrical properties of the material & construction of the conductor and of its insulation, ambient temperature, and environmental conditions adjacent to the cable. Having a large overall surface area may dissipate heat well if the environment can absorb the heat.
In a long run of cable, different conditions govern, and installation regulations normally specify that the most severe condition along the run governs the cable's rating. Cables run in wet or oily locations may carry a lower temperature rating than in a dry installation. Derating is necessary for multiple circuits in close proximity. When multiple cables are near, each contributes heat to the others and diminishes the amount of cooling air that can flow past the individual cables. The overall ampacity of the insulated conductors in a bundle of more than 3 must be derated, whether in a raceway or cable. Usually the de-rating factor is tabulated in a nation's wiring regulations.
Depending on the type of insulating material, common maximum allowable temperatures at the surface of the conductor are 60, 75 and 90 degrees Celsius, often with an ambient air temperature of 30°C. In the U.S., 105°C is allowed with ambient of 40°C, for larger power cables, especially those operating at more than 2 kV. Likewise, specific insulations are rated 150, 200 or 250°C.
The allowed current in cables generally needs to be decreased (derated) when the cable is covered with fireproofing material.
For example, the United States National Electric Code, Table 310-16, specifies that up to three 8 AWG copper wires having a common insulating material (THWN) in a raceway, cable, or direct burial has an ampacity of 50 A when the ambient air is 30°C, the conductor surface temperature allowed to be 75°C. A single insulated conductor in air has 70 A rating.
Ampacity rating is normally for continuous current, and short periods of overcurrent occur without harm in most cabling systems. The acceptable magnitude and duration of overcurrent is a more complex topic than ampacity.
When designing an electrical system, one will normally need to know the current rating for the following:- Wires
- Printed Circuit Board traces, where included
- Fuses
- Circuit breakers
- All or nearly all components used
Some devices are limited by power rating, and when this power rating occurs below their current limit, it is not necessary to know the current limit to design a system. A common example of this is lightbulb holders.
[http://en.wikipedia.org/wiki/Ampacity]
Тематики
- электротехника, основные понятия
Синонимы
EN
DE
- Dauerstrombelastbarkeit, f
- Strombelastbarkeit, f
FR
- courant admissible, m
- courant permanent admissible, m
Немецко-русский словарь нормативно-технической терминологии > Dauerstrombelastbarkeit, f
-
2 Strombelastbarkeit, f
(длительный) допустимый ток
Максимальное значение электрического тока, который может протекать длительно по проводнику, устройству или аппарату при определенных условиях без превышения определенного значения их температуры в установившемся режиме
[ ГОСТ Р МЭК 60050-826-2009]
Этот ток обозначают IZ
[ ГОСТ Р 50571. 1-2009 ( МЭК 60364-1: 2005)]EN
(continuous) current-carrying capacity
ampacity (US)
maximum value of electric current which can be carried continuously by a conductor, a device or an apparatus, under specified conditions without its steady-state temperature exceeding a specified value
[IEV number 826-11-13]
ampacity
The current in amperes that a conductor can carry continuously under the conditions of use without exceeding its temperature rating.
[National Electrical Cod]FR
courant (permanent) admissible, m
valeur maximale du courant électrique qui peut parcourir en permanence, un conducteur, un dispositif ou un appareil, sans que sa température de régime permanent, dans des conditions données, soit supérieure à la valeur spécifiée
[IEV number 826-11-13]Ampacity, the term is defined as the maximum amount of current a cable can carry before sustaining immediate or progressive deterioration. Also described as current rating or current-carrying capacity, is the RMS electric current which a device can continuously carry while remaining within its temperature rating. The ampacity of a cable depends on:
- its insulation temperature rating;
- conductor electrical properties for current;
- frequency, in the case of alternating currents;
- ability to dissipate heat, which depends on cable geometry and its surroundings;
- ambient temperature.
Electric wires have some resistance, and electric current flowing through them causes voltage drop and power dissipation, which heats the cable. Copper or aluminum can conduct a large amount of current before melting, but long before the conductors melt, their insulation would be damaged by the heat.
The ampacity for a power cable is thus based on physical and electrical properties of the material & construction of the conductor and of its insulation, ambient temperature, and environmental conditions adjacent to the cable. Having a large overall surface area may dissipate heat well if the environment can absorb the heat.
In a long run of cable, different conditions govern, and installation regulations normally specify that the most severe condition along the run governs the cable's rating. Cables run in wet or oily locations may carry a lower temperature rating than in a dry installation. Derating is necessary for multiple circuits in close proximity. When multiple cables are near, each contributes heat to the others and diminishes the amount of cooling air that can flow past the individual cables. The overall ampacity of the insulated conductors in a bundle of more than 3 must be derated, whether in a raceway or cable. Usually the de-rating factor is tabulated in a nation's wiring regulations.
Depending on the type of insulating material, common maximum allowable temperatures at the surface of the conductor are 60, 75 and 90 degrees Celsius, often with an ambient air temperature of 30°C. In the U.S., 105°C is allowed with ambient of 40°C, for larger power cables, especially those operating at more than 2 kV. Likewise, specific insulations are rated 150, 200 or 250°C.
The allowed current in cables generally needs to be decreased (derated) when the cable is covered with fireproofing material.
For example, the United States National Electric Code, Table 310-16, specifies that up to three 8 AWG copper wires having a common insulating material (THWN) in a raceway, cable, or direct burial has an ampacity of 50 A when the ambient air is 30°C, the conductor surface temperature allowed to be 75°C. A single insulated conductor in air has 70 A rating.
Ampacity rating is normally for continuous current, and short periods of overcurrent occur without harm in most cabling systems. The acceptable magnitude and duration of overcurrent is a more complex topic than ampacity.
When designing an electrical system, one will normally need to know the current rating for the following:- Wires
- Printed Circuit Board traces, where included
- Fuses
- Circuit breakers
- All or nearly all components used
Some devices are limited by power rating, and when this power rating occurs below their current limit, it is not necessary to know the current limit to design a system. A common example of this is lightbulb holders.
[http://en.wikipedia.org/wiki/Ampacity]
Тематики
- электротехника, основные понятия
Синонимы
EN
DE
- Dauerstrombelastbarkeit, f
- Strombelastbarkeit, f
FR
- courant admissible, m
- courant permanent admissible, m
Немецко-русский словарь нормативно-технической терминологии > Strombelastbarkeit, f
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3 Bedarf
Bedarf m 1. GEN need, requirement, demand; 2. WIWI demand, taste • Bedarf haben an GEN require • den Bedarf an etw. decken GEN meet the need for sth, satisfy the demand for sth* * *m 1. < Geschäft> need, requirement, demand; 2. <Vw> demand, taste ■ Bedarf haben an < Geschäft> require ■ den Bedarf an etw. decken < Geschäft> meet the need for sth, satisfy the demand for sth* * *Bedarf
need, want, supply, demand, occasion, (Erfordernis) requirement, (Verbrauch) consumption;
• bei Bedarf if required, on request;
• für sofortigen Bedarf for immediate requirements;
• nach Bedarf when required, as occasion may require, as requested;
• aufgeschobener Bedarf deferred (pent-up, US) demand;
• aufgestauter Bedarf pent-up (US) (replacement) demand;
• außerordentlicher Bedarf non-recurrent requirements;
• auf Spezialwerte beschränkter Bedarf (Börse) selective demand;
• dringender Bedarf urgent need;
• einheimischer Bedarf home demand (requirements), domestic demand;
• elastischer Bedarf elastic demand, discretionary wants;
• mittelbar entstandener Bedarf derived demand;
• gegenwärtiger Bedarf present needs;
• einvernehmlich geregelter Bedarf liquidated demand;
• geringer Bedarf not much required;
• gesteigerter Bedarf increased demand;
• inländischer Bedarf domestic (home, internal) demand;
• lebensnotwendiger Bedarf bare necessaries (necessities) of life;
• lebenswichtiger Bedarf essential supply, requirements of primary importance;
• lokaler Bedarf local requirements;
• möglicher Bedarf potential demand;
• nachträglicher Bedarf additional requirements;
• notwendiger Bedarf necessary requirements;
• öffentlicher Bedarf public requirements (expenditure);
• örtlicher Bedarf local consumption (wants);
• persönlicher Bedarf personal use (requirements, wants);
• preisabhängiger Bedarf price-dependent demand;
• spezifischer Bedarf selective demand;
• staatlicher Bedarf government consumption;
• täglicher Bedarf everyday consumption;
• tatsächlicher Bedarf actual demand;
• unelastischer Bedarf inelastic demand;
• gesamter volkswirtschaftlicher Bedarf schedule demand;
• voraussichtlicher Bedarf anticipated need (requirements);
• vordringlicher Bedarf primary demand;
• wirklicher Bedarf effective demand;
• zukünftiger Bedarf future needs;
• zurückgestellter Bedarf deferred demand;
• zusätzlicher Bedarf additional demand;
• Bedarf an Arbeitskräften labo(u)r requirements, number of jobs required;
• Bedarf zwischen Bestell- und Lieferzeit lead time demand;
• täglicher Bedarf an Lebensmitteln daily supply of food;
• Bedarf an Menschen und Material need for men and material;
• Bedarf am Platze local requirements;
• Bedarf an Produktionsgütern factor demand;
• Bedarf der Verbraucher consumer needs;
• Bedarf an Wohnhäusern deficiency of houses;
• Bedarf schriftlich angeben to record the requirements;
• nur für den eigenen Bedarf arbeiten to produce only for its own requirements;
• Bedarf befriedigen to meet the demand;
• seinen Bedarf bei... beziehen to draw one’s supplies from...;
• Bedarf decken to cover (comply with) the requirements, to supply (satisfy) the needs, to satisfy (meet) the demand;
• steigenden Bedarf des Handels decken to meet the increasing needs (demand) of trade;
• seinen Bedarf für die kommende Saison decken to order one’s supplies for the season;
• Bedarf haben to need, to require, to be in the market for;
• nach Bedarf halten (Zug) to stop when required;
• Bedarf hervorrufen (schaffen) to create a demand;
• Bedarf überdecken to swamp demand;
• Bedarf übersteigen to outstrip (outpace) the demand;
• entsprechend dem Bedarf des Kunden aktiv werden to act in response to customers’ requirements;
• hinter den Bedarf zurückfallen to fall short of the requirements. -
4 Ausnutzungsfaktor des paramagnetischen Materials
коэффициент использования парамагнетика
Отношение магнитного затухания, вносимого парамагнетиком в квантовый парамагнитный усилитель при выбранном распределении СВЧ поля, к максимально возможному при наилучшей поляризации СВЧ поля во всех точках парамагнетика и той же доле заключенной в нем магнитной энергии.
[Сборник рекомендуемых терминов. Выпуск 75. К вантовая электроника. Академия наук СССР. Комитет научно-технической терминологии. 1984 г.]Тематики
Обобщающие термины
EN
DE
FR
Немецко-русский словарь нормативно-технической терминологии > Ausnutzungsfaktor des paramagnetischen Materials
-
5 Lebensmittelbestrahlung
облучение продуктов питания
—
[ http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]EN
food irradiation
The most recent addition to food preservation technologies is the use of ionizing radiation, which has some distinct advantages over conventional methods. With irradiation, foods can be treated after packaging, thus eliminating post-processing contamination. In addition, foods are preserved in a fresh state and can be kept longer without noticeable loss of quality. Food irradiation leaves no residues, and changes in nutritional value due to irradiation are comparable with those produced by other processes. Irradiation is the process of applying high energy to a material, such as food, to sterilize or extend its shelf-life by killing microorganisms, insects and other pests residing on it. Sources of ionizing radiation that have been used include gamma rays, electron beams and X-rays. Gamma rays are produced by radioactive isotopes such as Cobalt-60. Electron beams are produced by linear accelerators, which themselves are powered by electricity. The dose applied to a product is the most important factor of the process. At high doses, food is essentially sterilized, just as occurs in canning. Products so treated can be stored at room temperature almost indefinitely. Controversial and banned in some countries. (Source: IFSE / VCN)
[http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]Тематики
EN
DE
FR
Немецко-русский словарь нормативно-технической терминологии > Lebensmittelbestrahlung
-
6 Schadstoffsenke
поглотитель загрязнения
—
[ http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]EN
pollution sink
Vehicle for removal of a chemical or gas from the atmosphere-biosphere-ocean system, in which the substance is absorbed into a permanent or semi-permanent repository, or else transformed into another substance. A carbon sink, for example, might be the ocean (which absorbs and holds carbon from other parts of carbon cycle) or photosynthesis (which converts atmospheric carbon into plant material). Sinks are a fundamental factor in the ongoing balance which determines the concentration of every greenhouse gas in the atmosphere. If the sink is greater than the sources of a gas, its concentration in the atmosphere will decrease; if the source is greater than the sink, the concentration will increase. (Source: GLOCHA)
[http://www.eionet.europa.eu/gemet/alphabetic?langcode=en]Тематики
EN
DE
FR
Немецко-русский словарь нормативно-технической терминологии > Schadstoffsenke
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